某弹药发射自燃现象的原因分析

Research on Cause of Spontaneous Combustion of Certain Type Ammunition

针对某轻武器在连续射弹60发后弹药在药室内自燃现象的原因分析。通过建立弹丸发射过程中含镀铬层身管和带漆层药筒的传热模型,选取药筒漆层厚度、身管与药筒紧密程度、药筒漆层破损状况3个关键因素进行传热分析。该研究证明了现有漆层厚度能保证弹药的安全性,说明弹药自燃主要原因是火药气体进入纵向气槽导致。

Aiming at the causes analysis of ammunition spontaneous combustion in the medicine chamber after 60 rounds of continuous projectile, by established a heat transfer model of chrome-plated tube and painted cartridge case during the projectile launch. Select several key factors, such as the thickness of the tube coating, barrel and cartridge case closeness, and the damage of the tube coating, for heat transfer analysis. It is proved that the thickness of the existing paint layer can guarantee the safety of ammunition, which indicates that the main reason for the ammunition spontaneous combustion is the introduction of the gunpowder gas into the longitudinal gas tank.